CVE-2015-2925

Description

The prepend_path function in fs/dcache.c in the Linux kernel before 4.2.4 does not properly handle rename actions inside a bind mount, which allows local users to bypass an intended container protection mechanism by renaming a directory, related to a "double-chroot attack."

6.9
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 0.96% Top 25%
Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory debian.org Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00018.html mailing list third party advisory vendor advisory
http://rhn.redhat.com/errata/RHSA-2015-2636.html third party advisory vendor advisory
http://www.debian.org/security/2015/dsa-3372 third party advisory vendor advisory
http://permalink.gmane.org/gmane.linux.kernel.containers/29173 mailing list broken link
http://rhn.redhat.com/errata/RHSA-2016-0068.html third party advisory vendor advisory
http://pkgs.fedoraproject.org/cgit/kernel.git/commit/?h=f22&id=520b64102de2f184036024b2a53de2b67463bd78 third party advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00009.html mailing list third party advisory vendor advisory
http://www.ubuntu.com/usn/USN-2792-1 third party advisory vendor advisory
http://www.securityfocus.com/bid/73926 vdb entry third party advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00034.html mailing list third party advisory vendor advisory
http://www.debian.org/security/2015/dsa-3364 third party advisory vendor advisory
http://www.ubuntu.com/usn/USN-2794-1 third party advisory vendor advisory
http://www.ubuntu.com/usn/USN-2799-1 third party advisory vendor advisory
http://www.ubuntu.com/usn/USN-2795-1 third party advisory vendor advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html third party advisory
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00005.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00017.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00007.html mailing list third party advisory vendor advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html third party advisory
http://permalink.gmane.org/gmane.linux.kernel.containers/29177 mailing list broken link
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00019.html mailing list third party advisory vendor advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cde93be45a8a90d8c264c776fab63487b5038a65 third party advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00021.html mailing list third party advisory vendor advisory
http://www.openwall.com/lists/oss-security/2015/04/04/4 third party advisory mailing list
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.2.4 vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1209367 issue tracking third party advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=397d425dc26da728396e66d392d5dcb8dac30c37 third party advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00020.html mailing list third party advisory vendor advisory
https://github.com/torvalds/linux/commit/cde93be45a8a90d8c264c776fab63487b5038a65 third party advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1209373 issue tracking third party advisory
https://github.com/torvalds/linux/commit/397d425dc26da728396e66d392d5dcb8dac30c37 third party advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00022.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00018.html mailing list third party advisory vendor advisory
http://www.ubuntu.com/usn/USN-2798-1 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2015-2925?
CVE-2015-2925 has been scored as a medium severity vulnerability.
How to fix CVE-2015-2925?
To fix CVE-2015-2925, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-2925 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2015-2925 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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